Cora»Occultation

2026-01-06 / UCAC4 568-016813 / (550) Senta

#	OBS	Observer	Occ	Meth.	Instr.	CC	TSRC	UT1	UT2	UT3	UT4	UT2E	UT3E	Dur.	Chrd
1	show	Björn Kattentidt	O+	VID	M280	DE	GPS	03:06:03	03:07:09.606	03:07:12.905	03:08:16	0.129	0.129	3.30	39.6
2	show	Tim Haymes	O+	VID	M280	GB	GPS	03:06:00	03:07:49.9	03:07:53.9	03:10:00	0.500	0.300	4.00	48.0

UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

2 observations found in db: sodis

Available (probably) matching predictions (click on the link to switch):

JPL#78 : 52b12cf0-de6d-11f0-4858-657a31dbc263 [db: asteroids]

JPL#78 : 52b12cf0-de6d-11f0-4858-8d5cecf77289 [db: asteroids]

Using prediction 52b12cf0-de6d-11f0-4858-657a31dbc263 for map and profile fit

Get observations as KML file (reduced site location resolution)

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result:
X0,Y0 = 839.6, 8.2 km
Circular diameter = 56 km

From 2 chords (VID)

You can enter space separated chord numbers (example: 11 4 8) or a method like VIS to ignore all visual timings, or a time source like RAD and NTP (but not GPS).
If the plot disappears, then there are less than 2 chords left (too much ignored, go back with browser).

Check SiMDA for size and mass data.

Check Johnston Archive for satellites.

Sky projection (artificial light) for occ. time: 2026-01-06, 03:07 UT (JD = 2461046.630)

DAMIT	Q	P (h)	λ, β	JD0	JD-JD0	φ0	Version	Modified	Vol-equiv D	Cmnt
# 774	None	20.573	63°, -40°	2.448504e6	12542.6	0.0°	None	None	not scaled	2013-10-15
# 775	None	20.573	258°, -58°	2.448504e6	12542.6	0.0°	None	None	not scaled	2013-10-15

Q: model quality flag (0-5, 5=highest) | P: rotation period | λ,β: ecl. lon. and lat. of spin axis (J2000) | JD: initial time (epoch) | φ0: initial rotation angle for JD0

Image size: 300px. Transparent image background for copy & paste

Map with groundtrack and observer stations

Event Details
Occultation UUID [and DB] : 52b12cf0-de6d-11f0-4858-657a31dbc263 [asteroids] Occultation Date + Time : 2026-01-06 at 03:14:27 UT +/- 0.01 min [1] Object Designation : (550) Senta Orbit Class : MBA Star Designation : GDR3 3416325911905910272 Star Coordinates (ICRF) : RA = 05 25 04.9377, DE = +23 26 34.368 [2] Star Magnitudes : G = 12.85 mag, RP = 12.03 mag, BP = 13.54 mag Object Magnitude : V = 13.7 mag Estimated Magnitude Drop : 1.3 mag Estimated Max. Duration : 3.1 sec Object Mean Diameter : 37.8 km (src: astorb) Speed of the shadow : 12.0 km/s Elongation to Moon & Sun : 60° (sunlit = 90%), Sun = 156° Cross-track uncertainty : 0.9 mas = 1 km = 0.03 path-width (1-sig) RUWE and duplicate source : 3.9 mas, dup.src = 0 (0:false, 1:true) Ephemeris Reference : JPL#78 Note : FP:true [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

Event Details

 Occultation UUID [and DB] : 52b12cf0-de6d-11f0-4858-657a31dbc263 [asteroids]

 Occultation Date + Time   : 2026-01-06 at 03:14:27 UT +/- 0.01 min  [1]
 Object Designation        : (550) Senta
 Orbit Class               : MBA
 Star Designation          : GDR3 3416325911905910272
 Star Coordinates (ICRF)   : RA = 05 25 04.9377, DE = +23 26 34.368  [2]
 Star Magnitudes           : G = 12.85 mag, RP = 12.03 mag, BP = 13.54 mag
 Object Magnitude          : V = 13.7 mag
 Estimated Magnitude Drop  : 1.3 mag
 Estimated Max. Duration   : 3.1 sec
 Object Mean Diameter      : 37.8 km  (src: astorb)
 Speed of the shadow       : 12.0 km/s
 Elongation to Moon & Sun  : 60° (sunlit = 90%), Sun = 156°
 Cross-track uncertainty   : 0.9 mas = 1 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 3.9 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#78
 Note                      : FP:true

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

More Data and Informations

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